Utilizing exhaust-steam in turbine plants.



G. PORNBR. UTXLIZING EXHAUST STEAM IN TURBINE PLANTS.

APPLICATION TILED PBB.7, 19-12v Patented-June11Q1912f 1 Q Inver bOr'. Georg: Former.

Wiknesses i ff 1 i iamngirmjggiofi BEBi'IN GERMANY" l lvon'roeuwunaii nrl ifiume'ceitrmr itemnxmarIo ZQ T v H l v Toul Z iohe m it concern:

i 'BeHit kno n that I, Gnone- Forums, :1

i subjectfofthe King of Prussia, residing at r Berlin, G r y have invented certain new in Utilizing EX- Plants, of which ation.

and useful Improvements haust-Steain in Turbine from one or more intermediate pressure points in a turbine after it has performed work in said turbine and has had its pressure reduced to'a greater or less extent.

The object of my invention is to provide a turblne and a governing mechanlsm therefor, of improved construction whereby the steamwill be effectively and economically utilized,'=bbthfin driving the turbine and. itsload and in furnishing steanrfor heating or other industrial purposes.

in carrying out my invention a 'multi stageturbine of any suitable type is prosame vided, The turbine may with advantage act: on theirnpulse plan. The turbine comprisestWO. elements, a main high pressure elementthrough which steam passes on its Way, to the heating or other device or devices,.and a supplemental element operating mixed pressure plan that is connected to a condenser. Therotors of the main and supplemental elements are mounted on the shaft. and ,in such manner, that the i ..,thrust on one is-balanced to a greater or -.les's extent by the thruston the other. The

governing unecha nism is so arranged that we. steam is supplied to the main element p only solong as itlis capable of handling the L oad andlsupplying the necessary amount of ever, the load (:0 is. admitted to the mixed steam itdth'e, heating System. When, howi nditions require, live steam mental element and the latter will then assist the'ma'in element in driving the load -on the shaft One ,of the stages of the mixed "pressure turbine receives steam from the exhaust of the high pressure portion. -This supply may be controlled by handor I automatically'as is desired. The adnnssion ofisteani to the-turbine as a Whole is 0011- trolled by a speed governor driven by the shaft and also by means of valve mechanism that is sensitive to variations in the shell or wheel casi pressure of the high pressure portion. e valve -mechan1sm is so ar- Specification of Letters Patent. Application filed February 7, 1912. Serial I 50. amass.

shows supplied to the turbine by buckets by pressure or supple; valve v16,

UTILIZING ExHAusr-srnntt INTURBINE rtniv'rs.

iveawa- 1* assessment 1e12,

the valve for the main hi supplemental portion.

The. invention is trated in the accompanying drawing, which a turbine and its valve mechanism in axial section. 7

On the common shaft 1 are mounted the wheel 2 of the main high pressure portion, and the Wheels 3 and -of thesupplemental mixed pressure portion, the said Wheels being inclosed in suitable casings or shells 5 and 6, Steam at any suitable pressure is the inlet pipe 7, The exhaust from tion is discharged by the conduit 8 to'the heating system, and the exhaust fromthe mixed pressure turbine is delivered by the conduit 9 to the condenser 10;. wheels is provided with two or of buckets between which rows the high pressure por .75 Eachoi the more rows, are intermediate buckets for reversing the direction struction.

12 indicates a speed governor that is driven by the turbine shaft through suitable gearing. This governor actuates the throttle valx'e 13 directly or indirectly as is desired. This valve has a double purpose. That is to say, it controls the passage of steam through the conduit Mto the high pressure portion of the turbine, and also controls the passage of steam to the mixedpressure portion of the turbine through the ports 15 shown: in dotted 'lines. In the pipe 14 connecting the parts of the turbine, is a in this case hand operated, by means of which the highpressure portion can be cut out o f service,;,v

17 indicates a valve for controlling the admission of steam to the high pressure portion. This valve is attached to the piston 18 contained in the cylinder 19. Aspring 20.tendsto open the valve at all times against the steam pressure existing in the cylinder the piston. Steam is admitted to the above 7, cylinder above the piston by the'pipe 21 that is connected to it and to the shell or casing of the high pressure portion of the. turbine. It will thus be seen that anysteam which the steam. sfiteam is supplied to the" nozzles 11 of any suitable con-' i the advantage h pressure port on of the gets 1 intopthe' -machi'ne 1s subject to the control, first, of a alves' 1.3 and17 are so arranged'that the former does not admitsteam to the supplemental mixed pressure portion. until the valve 17 is fully opened. case when the load on the turbine-is too great to be handled by the bucket wheel 2 flows through theconduit 14* under the control of valve 22and acts on thelow pressure wheel 4. By using the nozzle 2% and directing the steam therefronr against the first wheel, a certain amount of useful work is obtained therefrom although the wheel is not designed to receive low pressure steam. Owing to this fact, I omit the intermediate buckets infront of this nozzle.

- By reason of the arrangement-of the pipe 14-, the main high pressure portion of the turbine can housed in conjunction with the supplemental element when the heating system is shut off; This arrangement also has that when the requirements of the heating system are small, steam from the high pressure portion can be utilized in the mixed pressur e portion, and excessive ,heating of the parts of the high pressure portion due to friction are avoided, by reason of the continuous flow-of steam.

Then the high pressure portion is cut out .gof service by closing the valve 16, it is desir able to connect the conduit 8 and the pipe I bv reducing the. rotation losses and the wheels 3 andd operate as a high pressure condensing turbine.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but

I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means.

- lVhat'I claim as new and desire to secure by. Letters Patent of the United States, is

. 1. In combination, a turbine comprising a high pressure element in which the steam 55 expands to the permissible heating pressure,

This would be the and such steam as exhausts from it and 1 speed governor 'Qfifleadirig to the heating system with the' 27. In the pipe 25 a mixed pressure element supplementing the work of the former in driving a load, a conduit connected to and receiving the exhaust from the high pressure element for heating purposes, means for supplying a portion of the exhaust steam. fromv the high pressureelement to the mixedpressnre el means for supplying high pr the high and mixedpressure elements.

' 2. In combination, a turbine comprising a high pressure element in which the steam expands to the permissible heating pressure, a mixed pressure element supplementing the work of the former in driving a, load, means supplying low pressure steam thereto, a conduit connected to and receiving exhaust steam from, the high pressure element for heating purposesaa regulator sens tive to the pressure of thesteam entering the conduit for controllingithe admission of steam to the high pressure element, and a for controlling the admission of high pressure steam to the mixed pressure element. 1

3. In combination, a turbine comprising a high pressure element and a mixed pressureelement, a conduit receiving exhaust steam from the high pressure element, controlling valves for' both elements, that for the high pressure element receiving steam after it has passed through the controlling valve of the mixed pressure element, a speed governor that controls the valve of the mixed pressure element, and a pressure sensitive regulator for the valve of said high pressure element. a v

4. In a steam plant in which steam is drawn oif for industrial purposes, the combination of a main turbine element through which said steam passes and performs work, a supplemental turbine element, means for admitting steam thereto only when said main element cannot carry the load, and a conduit that receives steam from the main turbine for industrial purposes.

5.-In a steam plant in which steam is drawn off for industrial purposes, the combination of a main turbine element through whichsaidsteam passesand performs work,

a conduit receiving steam therefrom, a sup- 15 plemental turbine element, a throttle valve which admits steam to the main element up to the point where it is operating at full capacity and thereafter admits steam to the supplemental element, and a speed governor for controlling said valve. 7

6. In a steam plant in which steam is drawn off for industrial purposes, the [combination of a main turbine element through which said steam passes and performs work,

a supplemental turbine element mounted on the same shaft as the main element and having its thrust opposed thereto, a throttle valve that is common to both' elements and arranged to supply the main elementfup to 1 its 'full capacity and thereafter to admit steam to supplemental" element, and a conduit for conveying exhaust steam from .the main element to a stage of the supplemental element. Y

- 7. In combination, a main turbine ele'-. ment, a staged supplemental turbine element,.a conduit connected to and receiving.

. exhaust steam from the main element for heating purposes a condenser connected to' the supplemental element,.means for s p-.

plying high pressure steam to either or 0th elements, and aconduit for conveying ex-= haust steam from'th'e main element to a low pressure-stage of the supplemental element.

- 8. In combination, a main turbine ele-: .ment, a staged supplemental turbine element, a .conduit connected to and receiving exhaust steam from the main element 'for heating purposes, a condenser connected. to the supplemental element, means for supplying high pressure steam to either or both elements, 'a'conduit for conveying-exhaust steam from the main element to a low-pres sure stage of the supplemental element, and 'a conduit for connecting the casing of the main element to-the condenser when it is running under certain conditions. to reduce rotation losses; y a

, 9. In a system of the character described, the combination of a main element, a sup-'v plemental-element, a conduit that receives steam'from the main element-for industrialpurposes, -a T,'condu it conveying e haust steam from the main element to a .eorr'e-I "spondingpressure' stage in the supplemental element, and means for-supplying high pressure steam to both ofsaid elements.

1 10. In a' system of the character described, the combination of-a main element that .re-

ceives' fluid from one source only a supplemental element that receives flui from the same source-asthemai'n element and also.

receives exhaust steam from said main "ele-'.--'-

OSCAR Ennnrn. 

